161213127670 has 48 divisors (see below), whose sum is σ = 339511944528. Its totient is φ = 54953545920.

The previous prime is 161213127611. The next prime is 161213127689. The reversal of 161213127670 is 76721312161.

161213127670 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 866116 + ... + 1035655.

It is an arithmetic number, because the mean of its divisors is an integer number (7073165511).

Almost surely, 2^161213127670 is an apocalyptic number.

161213127670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161213127670 is an abundant number, since it is smaller than the sum of its proper divisors (178298816858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161213127670 is a wasteful number, since it uses less digits than its factorization.

161213127670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901965 (or 1901958 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 161213127670 in words is "one hundred sixty-one billion, two hundred thirteen million, one hundred twenty-seven thousand, six hundred seventy".